APA Style

a, Z, V. et al (2009). services marketing integrating custumer focus across the firm (fifth edition) (cetakan,2009). Singapore: mcgraw hill education.

MLA Style

a, Zeithaml, Valarie. et al. "services marketing integrating custumer focus across the firm (fifth edition)". cetakan,2009 Singapore: mcgraw hill education, 2009. Text.